42666320 has 80 divisors (see below), whose sum is σ = 103445760. Its totient is φ = 16353792.

The previous prime is 42666313. The next prime is 42666331. The reversal of 42666320 is 2366624.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 271682 + ... + 271838.

It is an arithmetic number, because the mean of its divisors is an integer number (1293072).

Almost surely, 2^42666320 is an apocalyptic number.

42666320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42666320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51722880).

42666320 is an abundant number, since it is smaller than the sum of its proper divisors (60779440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42666320 is a wasteful number, since it uses less digits than its factorization.

42666320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292 (or 286 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 42666320 is about 6531.9461112290. The cubic root of 42666320 is about 349.4312395131.

The spelling of 42666320 in words is "forty-two million, six hundred sixty-six thousand, three hundred twenty".